CLIFF/divertor heat transfer by Sergey Smolentsev APEX e-Meeting 22 - PowerPoint PPT Presentation

May 21, 2023 •213 likes •269 views

CLIFF/divertor heat transfer by Sergey Smolentsev APEX e-Meeting 22 February 4, 6 2003 Temperature rise over OB FW L=8.4 m Ts, no waves OB FW U=10 m/s Tb 100 h=2.3 cm Ts, with waves B=10 T 80 To=350 C Tallowable=510 C Surface

CLIFF/divertor heat transfer by Sergey Smolentsev APEX e-Meeting 22 February 4, 6 2003
Temperature rise over OB FW L=8.4 m Ts, no waves OB FW U=10 m/s Tb 100 h=2.3 cm Ts, with waves B=10 T 80 To=350 C Tallowable=510 C Surface heating (Tom Rognlein) (T-To), K 60 Neutron heating (7 MW/m 2 av.) 40 No waves Tmax=To+ ∆ T=350+90=440<510 C 20 With waves Tmax=To+ ∆ T=350+60=410<510 C 0 0 0.2 0.4 0.6 0.8 1 x / L
Temperature rise over outer divertor Outer divertor 400 L=0.5 m Separatrix U=10 m/s h=2.3 cm 300 B=10 T To=370 C (T-To), K Tallowable=700 C Surface heating (Tom Rognlein) 200 100 No waves Tmax=To+ ∆ T=(350+20)+370=740 C Tallowable=700 C 0 0 0.1 0.2 0.3 0.4 0.5 Distance along plate, m q s 10 MW/m 2
Maximum heat flux allowable FW heat transfer calculations: Divertor heat transfer calculations: Initial data: Initial data: - L=8.4 m - L=2 cm / 10 cm / 50 cm - U=10 m/s - U=10 m/s - h=2.3 cm - h=2.3 cm - B=10 T - B=10 T - Initial T =350 C - Initial T =350 C - Allowable Tsurf=510 C - Allowable=700 C - uniform surface heat flux - uniform surface heat flux - no volumetric heating due to neutrons - no volumetric heating due to neutrons Results: Results: Max. surface heat flux Max. surface heat flux (L=2 cm) = 42 MW/m2 (without waves)=2.1 MW/m2 Max. surface heat flux (L=10 cm) = 20 MW/m2 Max. surface heat flux (L=50 cm) = 9.5 MW/m2 Max. surface heat flux (with waves)=3.2 MW/m2

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